Yarn having laminated structure

ABSTRACT

A laminated yarn, which is characterized in that it is prepared by a method comprising evaporating an antibacterial metal onto a synthetic resin film to form a vapor deposition membrane, adhering the resultant synthetic resin films so as for the vapor deposition membrane to be positioned inside, and cutting the resultant laminated film having a sandwiched structure in a long narrow form along its longitudinal direction. The yarn is free from the lowering of antibacterial activity by repeated washing, is excellent in the prevention of rise in its temperature, the insulation of heat and an electromagnetic wave, and antistatic properties, and has excellent appearance.

FIELD OF THE INVENTION

[0001] The present invention relates to a laminated yarn, and inparticular, to have various excellent characteristics, such as aestheticappreciation property, antibacterial property, washing resistance,prevention of temperature rising, insulation of heat, antistaticproperty, flexibility, insulation of electromagnetic wave.

BACKGROUND ART

[0002] In recent years, articles equipped with antibacterial property isrequired with development of hygienic way of thinking, and it goeswithout saying that not only in gauze and bandage for medicaltreatments, but in clothes or dishcloth materials equipped withantibacterial property is increasingly required. In these gauze and thelike equipped with antibacterial properties, antibacterial yarnsequipped with antibacterial property are used as a material.

[0003] As such antibacterial yarns, fine metallic yarns in which silverand copper are drawn long and slender, metal plated yarns with silverand steel plated on a surface of yarns, such as synthetic fibers, andyarns including the antibacterial agent that the antibacterial agent ismixed therein or is applied thereon and the like are conventionallyused.

[0004] Moreover, from a viewpoint of reduction of displeasure to wearerby static electricity, and of prevention of electrostatic failure bystatic electricity over electronic products, various antistatic textilesare used. As such antistatic textiles, textiles including carbon fiber,and textiles in which processing by chemicals is given in silk-reelingprocess or dyeing process are conventionally used.

[0005] Moreover, in the medical field, a gauze is rolled on a suturepart of a living body to close the affected part in the case of anoperation, and after the gauze concerned is removed in a predeterminedperiod, the amount of bleeding from a suture part is measured forexamining procedure after the operation is conducted. As such gauze,materials blocking X rays including vinyl chloride yarn or a finemetallic yarn is used in order to easily find out the applied location.

[0006] In addition, in order to reduce displeasure caused by atmospherictemperature variation, clothes in which heat of vaporization at the timeof sweat evaporation is utilized to accelerate cooling effect, clothesequipped with exothermic mechanism using evaporation of water content,such as sweat, and clothes in which electric heating wire is woven areutilized.

[0007] However, when it was required to give various characteristics,such as antibacterial property, to textiles by using conventional finemetallic yarns, carbon fiber and the like in textiles, there have beenthe following problems.

[0008] Firstly in a fine metallic yarn or metal plated yarn, when thesewere used for textiles there was a problem that deterioration ofappearance of the textiles was induced or an antibacterial property wasfallen since the surface oxidizes with aging, a bleaching agent or thelike and the surface was blackened. In addition, since the metalportions of these fine metallic yarns or metal plated yarns were easilyheated by infrared radiation and the like, when infrared warmingtreatment was done with the textiles including them as a material worn,for example, there was also a problem that a low-temperature burn wasinduced.

[0009] Next, in yarns including the antibacterial agent, there was aproblem that antibacterial property was decreased and lost by repeatedwashing in a short period of time since the antibacterial agent waseluted by washing.

[0010] Moreover, since carbon fiber that is one of antistatic yarn is ablack yarn, it has a problem that articles in which the yarn might beused were limited in view of an appearance of the articles, and therewas a problem of losing antistatic property by repeated washing whentreatment by chemicals was conducted in silk -reeling process or dyeingprocess.

[0011] Moreover, although the gauze made of a vinyl chloride yarn or afine metallic yarn contributed to X ray imaging, it had a problem in thefunction of gauze original as textiles, such as toxicity or the poortouch and the poor flexibility. Moreover, in clothes acceleratingcooling effect with heat of vaporization at the time of sweatevaporation, although a fixed thermoregulation function and a fixedinsulation of heat were equipped, they only had either of the functionof cooling or heating, and therefore the usage was also limited.

[0012] In addition, even if a plurality of these yarns were combined, itwas difficult to manufacture textile products equipped with a pluralityof characteristics, such as antibacterial property, antistatic property,prevention of temperature rising, flexibility, an insulation ofelectromagnetic wave, and good appearance.

[0013] Then, an object of the present invention is to provide alaminated yarn equipped with antibacterial activity that is notdecreased even after repeated washing, prevention of temperature rising,insulation of heat, antistatic property, flexibility, outstandinginsulation of electromagnetic wave and the like, and also equipped withoutstanding good appearance.

DISCLOSURE OF THE INVENTION

[0014] Namely, a laminated yarn according to the present invention ischaracterized in that antibacterial metal is vapor-deposited onto asynthetic resin film to form a vapor deposition membrane, the formedsynthetic resin films are adhered so that a vapor deposition membranemay be placed inside, and resultant laminated film obtained by beingadhered into a sandwiched structure is cut in lengthwise direction togive a long and narrow form.

[0015] Moreover, a coat layer may be prepared on a surface of syntheticresin film opposite to a surface on which vapor deposition membrane isformed, and a coat layer may be prepared between a synthetic resin filmand a vapor deposition membrane or on a vapor deposition membrane.

BRIEF DESCRIPTION OF THE DRAWINGS

[0016]FIG. 1 is a view typically showing a structure of a laminatedyarn;

[0017]FIG. 2 is a graph showing a result of an examination of preventionof temperature rising;

[0018]FIG. 3, FIG. 4, and FIG. 5 are views typically showing structuresof other laminated yarns.

BEST MODE FOR CARRYING OUT THE INVENTION

[0019] Hereinafter, embodiments of the present invention will bedescribed based on drawings.

[0020]FIG. 1 is a view showing typically a structure of a laminated yarn1 according to the present invention. As is shown in this figure, alaminated yarn 1 is a yarn having a sandwiched structure in which avapor deposition membrane 12 made of an antibacterial metal issandwiched by synthetic resin films 11, and is formed by a procedure asshown below.

[0021] First, antibacterial metal is vapor-deposited by a vacuumdeposition method or an ion vacuum deposition and the like to form avapor deposition membrane 12 on a synthetic resin film 11. Next, thesynthetic resin films 11 with vapor deposition membrane 12 formedthereon are adhered with adhesive so that the vapor deposition membranesmay be placed inside to manufacture a laminated film with a sandwichedstructure in which antibacterial metal is sandwiched between thesynthetic resin films. Finally, the laminated film is cut in lengthwisedirection and a laminated yarn 1 is obtained.

[0022] Here, synthetic resin film here is a film made of polyester,nylon, polyethylene, polypropylene and the like, and a thickness isabout 4 to 50 microns, and preferably about 4 to 12 microns.

[0023] Moreover, metals that is used here as layer are metals havingantibacterial property in which ion exchange is enabled, such as silver,copper, and zinc, especially, silver is the optimal in view of anti-rustproperty and high antibacterial ability. A thickness of the vapordeposition membrane 12 is about 20 to 100 nm, and preferably about 50 to100 nm in view of guarantee of function and product cost, and whenthickness is set as 700 nm or more, electromagnetic wave in a broadrange from infrared radiation to X ray may be blocked without a coatlayer prepared.

[0024] Furthermore, as the above-described adhesives, althoughpolyurethane derived adhesives, polyester derived adhesives, and acrylicadhesives may be mentioned, taking safety of textiles in which lowformalin property is required into consideration, adhesives ofpolyurethane derived or polyester derived is preferable.

[0025] Thus, the laminated yarn 1 is a yarn that has a sandwichedstructure in which a vapor deposition membrane 12 made of antibacterialmetal is sandwiched between synthetic resin films 11, and is a yarnequipped with color of the antibacterial metal.

[0026] In addition, a width in the case where a laminated film is cut inlengthwise direction is about 0.1 to 1.0 mm. Especially, when a balanceof various characteristics, such as aesthetic appreciation property,anti-static property, and insulation of heat are taken intoconsideration, the width is desirably about 0.15 to 0.226 mm.

[0027] Thus, since side edges of the vapor deposition membrane 12 areexposed outside and are oxidized or chlorinated, but the oxidizedportion concerned may be removed because of mutual abrasion betweenadjoining fibers, and if not removed the portion concerned may not beobserved with naked eyes. Moreover, since it is protected by thesynthetic resin films 11, any portions other than the side edges of thevapor deposition membrane 12 are not oxidized or chlorinated. Therefore,even if it receives repeated washing, or is bleached, antibacterialactivity will not be deteriorated, or the vapor deposition membrane 12will not be blackened to deteriorate appearance of textiles.

[0028] Moreover even if heat is added from outside, since most of themetal vapor deposition membranes 12 are covered with synthetic resinfilms, temperature of the laminated yarn 1 will not rise rapidly toinduce low-temperature burn, and even if static electricity is inducedin clothes with the laminated yarn 1 woven therein, since staticelectricity may be removed outside through the vapor deposition membrane12 not to charge static electricity.

[0029] Furthermore, since a broad range of electromagnetic wave frominfrared radiation to X-rays is blocked with a work of metal that formsthe vapor deposition membrane, high insulation of electromagnetic waveand high insulation of heat are equipped, and since it is based on asynthetic resin film, it has high flexibility.

[0030] Subsequently, a laminated yarn according to the present inventionwill be manufactured and various examinations will be conducted todescribe the present invention still in detail.

[0031] Experiment 1

[0032] (1) Manufacture of a Laminated Yarn

[0033] Solid silver was vapor-deposited by an ion vacuum depositionmethod, and a vapor deposition membrane with a thickness of 50 nm wasformed on a polyester film (manufactured by Toyobo Co., Ltd.) with athickness of 12 microns. Next, the above-described polyester films withvapor deposition membrane were adhered together so that the vapordeposition membranes are placed inside with polyester derived adhesiveto manufacture a laminated film having a sandwiched structure. Finally,the above-described laminated film was cut so that it might have widthof 226 microns in lengthwise to obtain a laminated yarn, and thelaminated yarn was presented to following various examinations.

[0034] (2) Antibacterial Examination

[0035] A toweling in which the laminated yarn was woven in as groundyarn so that 6 mm of space might be given was used for antibacterialexamination conducted by a shake flask method. In addition, Klebsiellapneumoniae was used as a sample bacillus, and a cloth (made of nylon)which was not processed was used as experimental control. Results areshown in Table 1. TABLE 1 Number of bacilli Number of immediatelyresidual bacilli Rate in after after 18 hours reduction of Sampleinoculation 35° C. bacilli (%) Toweling 1.1 × 10⁴ 3.0 × 10³ 72.7Unprocessed cloth 1.1 × 10⁴ 1.2 × 10⁴ −9.1 (made of nylon)

[0036] Next, a tiptoe portion of socks in which the laminated yarn wasknit at intervals of about 1 mm was used, and antibacterial examinationwas conducted by a shake flask method. In addition, Klebsiellapneumoniae was used as a sample bacillus, and a cloth (made of nylon)which was not processed was used as experimental control. Results areshown in Table 2. TABLE 2 Number of bacilli Number of immediatelyresidual bacilli Rate in after after 18 hours reduction of Sampleinoculation 35° C. bacilli (%) Tiptoe portion of 1.7 × 10⁴ 7.4 × 10³56.5 socks Unprocessed cloth 1.7 × 10⁴ 1.6 × 10⁴ 5.9 (made of nylon)

[0037] Furthermore, a panty hose in which the laminated yarn was knit atintervals of 2 mm was used, and antibacterial examination was conductedby a number of bacilli measuring method by SEK. In addition,Trichophyton was used as a sample bacillus, and a cloth (made of nylon)that was not processed was used as experimental control. Results areshown in Table 3. TABLE 3 Number of bacilli Number of immediatelyresidual bacilli Rate in after after 18 hours reduction of Sampleinoculation 37° C. bacilli (%) Panty hose 8.0 × 10⁴ 10 or less 99.9 ormore (growth of bacillus not observed) Unprocessed cloth 8.0 × 10⁴ 6.3 ×10⁴ 21.3 (made of nylon)

[0038] As is clear from Tables 1, 2, and 3, when a same number of samplebacillus was inoculated and then a number of residual bacilli afterpredetermined period was compared, a sufficient difference was observedbetween the sample and the experimental control, and it was recognizedthat the laminated yarn had a sufficient antibacterial effect. Moreover,it was recognized that an antimicrobial spectrum of the above-describedlaminated yarn showed a broad spectrum from Klebsiella pneumoniae thatis bacteria (procaryote) to Trichophyton that is fungus (eukaryote).

[0039] (3) Washing Resistance Examination

[0040] A toweling in which the laminated yarn was woven in as groundyarn so that 4 mm of space might be given was washed predeterminednumber of times, ant then antibacterial examination was performed by ashake flask method, and a change of antibacterial activity by washingwas examined. In addition, Klebsiella pneumoniae was used as a samplebacillus. Results are shown in Table 4. TABLE 4 Number of bacilli Numberof immediately residual bacilli Rate in Number of times after after 18hours reduction of of washing inoculation 35° C. bacilli (%) With nowashing 1.5 × 10⁴ 4.2 × 10³ 72.0 After 50 times of 1.5 × 10⁴ 4.0 × 10²97.3 washing After 100 times of 1.5 × 10⁴ 1.0 × 10² 99.3 washing After200 times 1.5 × 10⁴ 5.2 × 10  99.7 of washing

[0041] Next after a food wrapping cloth in which the laminated yarn waswoven in as ground yarn so that 5 mm of space might be given was washedpredetermined number of times, antibacterial examination was performedby a shake flask method, and change of antibacterial activity by washingwas examined. In addition, Escherichia coli was used as a samplebacillus. Results are shown in Table 5. TABLE 5 Number of bacilli Numberof immediately residual bacilli Rate in Number of times after after 18hours reduction of of washing inoculation 35° C. bacilli (%) With nowashing 1.6 × 10⁴ 2.8 × 10³ 82.5 After 10 times of 1.6 × 10⁴ 1.6 × 10³90.0 washing After 20 times of 1.6 × 10⁴ 2.0 × 10² 98.8 washing After 30times of 1.6 × 10⁴ 4.0 × 10² 97.5 washing

[0042] Furthermore, after a food wrapping cloth in which the laminatedyarn was woven in as ground yarn so that 5 mm of space might be givenwas washed predetermined number of times, antibacterial examination wasperformed by a SEK standardized examining method, and change ofantibacterial activity by washing was examined.

[0043] In addition, Escherichia coli O-157 was used as a samplebacillus, and a cotton gauze was used as experimental control. Resultsare shown in Table 6. TABLE 6 Number of bacilli Number of immediatelyresidual bacilli Rate in Number of times after after 18 hours reductionof of washing inoculation 37° C. bacilli (%) Cotton gauze 1.6 × 10⁴ 5.2× 10⁷ −3.2 × 10⁵ After 10 times of 1.6 × 10⁴ 5.0 × 10² 96.9 washingAfter 20 times of 1.6 × 10⁴ <1.0 × 10²  99.4 washing After 30 times of1.6 × 10⁴ 1.0 × 10³ 94.0 washing

[0044] As is clear from Tables 4, 5, and 6, even after repeated washing,antibacterial activity of the laminated yarn did not decline, andmoreover it turned out that impurity was decreased as the washing wasrepeated thereby improve antibacterial activity.

[0045] (4) Chlorine Bleaching Agent Resistance Examination

[0046] About 10 g of laminated yarn was bundled and a change of colorwas observed after predetermined number of times of bleaching wascarried out. In addition, as bleaching liquor, a liquid in which 12 mlof kitchen bleaching agent was added to 300 ml of distilled water wasused, and in order to evaluate difference by temperature, examinationtemperature was varied to conduct experiment. Results are shown in table7. TABLE 7 Bleaching condition/ number of repetitions 1 2 7 Bleachingtest Change not Change not Change not (30° C. × 30 minutes) observedobserved observed Bleaching test Change not Change not Change not (50°C. × 30 minutes) observed observed observed

[0047] As is clear from Table 7, even if the bundled laminated yarnswere bleached, in particular, even if bleached under severe conditionsof 50° C. and 30 minutes, it was confirmed that the laminated yarns didnot blackened.

[0048] (5) Prevention of Temperature Rising Examination

[0049] A piece of T-shirt was sawn from a plain knit fabric in which thelaminated yarn was knit at intervals of 5 mm, and the T-shirt concernedwas heated with an infrared lamp from a position about 20 cm above toevaluate a surface and inside portion of the fabric for temperaturevariation. Results are shown in a graph of FIG. 2. In addition, aT-shirt that did not include the laminated yarn was used as experimentalcontrol.

[0050] As is clear from FIG. 2, even if the laminated yarn was woven in,prevention of temperature rising did not fall, and it turned out that asame level of temperature rise was shown as in the experimental control.

[0051] (6) Insulation of Heat Examination

[0052] A core yarn with cotton yarn count of No. 30 single in which thelaminated yarn as core was covered with cotton staple fiber wasmanufactured, and a coat cloth was manufactured in which 20 (A), 12 (B),and 7 (C) per 1 inch of the cored yarn, respectively, was included aswarp yarn or weft yarn. And coat cloths (A), (B), and (C), and a coatcloth that did not include the laminated yarn (blank) were irradiated bya light from a front side of the cloths to measure a difference oftemperature between front and back side of the cloths. A change bypassage of time of difference of temperature in front and back side ofthe cloth are shown in Table 8, and measured temperature of each of thecloths after 5-minute irradiation are shown in Table 9. TABLE 8Irradiation Period (min) Sample name 0 1 2 3 4 5 (A) 0.2 3.2 5.9 7.9 9.611.1 (B) 0.2 3.1 5.9 7.7 9.3 10.5 (C) 0.2 2.8 5.5 7.3 9.1 9.9 Blank 0.32.8 5.4 7.2 8.3 9.1 (° C.)

[0053] TABLE 9 Irradiation period (min) Sample name 5 (A) Front 44.0side Back 32.8 side (B) Front 43.6 side Back 35.0 side (C) Front 43.3side Back 35.2 side Blank Front 43.7 side Back 35.3 side (° C.)

[0054] In Tables 8 and 9, when a difference of temperatures on frontside of the cloth and on backside after 5 minutes of light irradiationwas compared, it turned out that a difference of temperature in (A)including 20 of core yarns per 1 inch was larger about 2 to 3° C.compared with the blank. Therefore it turned out that insulation of heatwas improved when core yarn including the laminated yarn was woven in.

[0055] (7) Antistatic Property Examination

[0056] A T-shirt manufactured in (5) was used and antistatic functionalexamination was conducted according a method in JIS 1094-5 publication.Measurement conditions are temperature of 20° C., and 20% of humidity.Results are shown in Table 10. In addition, a T-shirt that did notinclude the laminated yarn was used as experimental control. TABLE 10Half value Charged amount period Triboelectrification measurement ofmeasurement voltage triboelectrifications Sample (SEC) measurement (V)(μC/m²) T-shirt 46.5 50 or less 0.19 including the laminated yarnT-shirt 12.0 1320 1.57 without the laminated yarn

[0057] As is shown in Table 10, charge and voltage of static electricityaccumulated in the T-shirt fell, showing that antistatic function wasimproving by the laminated yarn woven therein.

[0058] Experiment 2

[0059] (8) Manufacture of Twisted Yarn

[0060] A metal layer with a thickness of 50 nm made of solid silver(99.99% of purity, manufactured by Mitsubishi Materials Corporation) wasformed by a vacuum deposition technology on a polyester film(manufactured by Toray Corporation) having a thickness of 9 microns. Thesynthetic resin films obtained were adhered together with a polyestersystem adhesive (manufactured by SUMITOMO 3M Limited) so that the vapordeposition membranes might be placed inside, and was cut out by thewidth of 150 microns to manufacturer a laminated yarn. And two polyesteryarns of 30 deniers/5 filament were twisted by right and left oppositedirection around the laminated yarn, and a twisted yarn wasmanufactured.

[0061] (9) Manufacture of a Cloth for Gentleman Suit Lining Cloth

[0062] Warp yarns warped so that polyester yarn (manufactured by TorayCorporation) of 50 deniers/10 filaments might be 150 ends per 1 inch,and weft yarns in which 30 ends of polyester yarns (manufactured byToray Corporation) of 75 deniers/72 filaments, and the twisted yarnmanufactured in (8) were combined so that it may be 70 ends per 1 inchin total were woven to obtain a twill cloth. The twill cloth afterscoured was dyed in blue by disperse dyes to manufacturer a cloth forgentleman suit lining cloth. In addition, the twisted yarn in the clothfor gentleman suit lining cloth showed a blue metallic color, and spaceof the twisted yarns was about 10 mm.

[0063] (10) Antistatic Property Examination

[0064] An experimental control using a polyester yarn (manufactured byToray Corporation) of 75 deniers/72 filaments instead of the twistedyarn was manufactured by a same method as in (9). The cloth was rubbedfor 1 minute with a nylon and acrylic cloth under an environment oftemperature of 20° C., and 20% of humidity, and a charged voltage at amoment when friction was stopped was measured, and an electrostaticresistance examination was conducted. Accordingly, a charged voltage ina cloth for gentleman suit lining cloth manufactured in (9) showed 300volts or less in contrast to the charged voltage of the experimentalcontrol exceeding 4000 volts.

[0065] Experiment 3

[0066] (11) Manufacture of a Cloth for Gentleman Suit Lining Cloth

[0067] Except that the twisted yarn manufactured in (8) was 10 ends inan equal pitch in 1 inch, and that a cloth was dyed in black by dispersedyes, a cloth for gentleman suit lining cloth was manufactured in a samemethod as in (9). In addition, the twisted yarn in the cloth forgentleman suit lining cloth showed a black metallic color, and space ofthe twisted yarns was about 2.5 mm.

[0068] (12) Insulation of Heat Examination

[0069] An experimental control in which a polyester yarn (manufacturedby Toray Corporation) of 75 deniers/72 filaments was used instead of thetwisted yarn was manufactured by a same method as in (11), andinsulation of heat examination was conducted according to followingprocedures of (a) to (d). Firstly, (a) lights (two National lamps:PRF-500 wWB were used) were installed in one side; (b) the experimentalcontrol and the cloth for gentleman suit lining cloth manufactured in(11) were placed combined with a brown clothing fabric forming two sheetdoubling in a shape of a screen, respectively, in a place making a rightangle in a progress direction of the light distant from the light 30 cm;(c) irradiated for 5 minutes by the light; (d) a difference oftemperatures in a light side and an opposite side of the experimentalcontrol and the cloth for gentleman suit lining cloth manufactured in(11) was measured.

[0070] As a result, a temperature in the light side of the experimentalcontrol showed 44.8° C., and a temperature in opposite side showed 29.1°C. And a temperature in the light side of the cloth for gentleman suitlining cloth manufactured in (11) showed 46.1° C., and a temperature inopposite side of the light showed 27.2° C. Accordingly, compared withthe experimental control, the cloth for gentleman suit lining clothmanufactured in (11) turned out to block 1.3° C. in the light side (heatsource side), and 1.9° C. of heat in the opposite side.

[0071] Experiment 4

[0072] (13) Manufacture of Cloth for Coats

[0073] A laminated yarn manufactured in (1) was covered by a weft fiberand a core yarn having No. 30 cotton count was manufactured. Next, aweft yarn in which No. 30 count cotton yarn 5 ends might be combined tothe above-described core yarn 1 end was woven at a same pitch to a warpyarn warped so that No. 30 count weft yarn might be 150 ends per 1 inchto give 80 ends per 1 inch to obtain a gabardine cloth. The cloth wasscoured and dyed in black with disperse dyes to manufacture a cloth forcoats.

[0074] (14) Insulation of Heat Examination

[0075] A cloth for coats in which a same method as in (13) was repeatedand manufactured except that only No. 30 count cotton yarn having beenused as weft yarn was used as an experimental control, and insulation ofheat examination was conducted by the same method as in (12).

[0076] As a result, a temperature in the light side of the experimentalcontrol showed 40.5° C., and a temperature in the opposite side to thelight showed 28.2° C. Moreover, temperature in the light side of thecloth for gentleman suit lining cloth manufactured in (13) showed 43.3°C., and temperature in the opposite side of the side showed 26° C.Accordingly, compared with the experimental control, the cloth for coatsmanufactured in (13) turned out to block 2.8° C. in the light side (heatsource side), and 2.2° C. of heat in the opposite side.

[0077] Experiment 5

[0078] (15) Manufacture of a Shirt

[0079] A weft yarn in which No. 40 count cotton yarn 4 ends might becombined to the core yarn used in (13) 1 end was woven to a warp yarnwarped so that No. 40 count cotton yarn might be 130 ends per 1 inch toobtain a broadcloth with 85 ends per 1 inch. The cloth was bleached anda shirt was manufactured.

[0080] (16) Insulation of Heat Examination

[0081] A same person wore a shirt manufactured in (15) and a shirt of anexperimental control, after walk exercising for 5 minutes in 18° C. ofatmospheric temperature, and 50% environment of humidity. Stationarystate was maintained for 3 minutes in wearing state, and a difference inskin surface temperature was measured with a thermograph. In addition,an experimental control shirt was manufactured in a same method as in(15) except for No. 40 count cotton yarn having been used instead of thecore yarn.

[0082] Accordingly, as compared with the experimental control, it turnedout that the shirt manufactured by (15) was excellent by 3.2° C. inkeeping warm property.

[0083] Experiment 6

[0084] (17) Manufacture of Cloth for Lace Curtain

[0085] Polyester yarn of 150 deniers 90 ends per 1 inch and the twistedyarn (same as the yarn manufactured in (8)) 10 ends inserted equallybetween the polyester yarns were used as warp yarn to be knitted by araschel machine that was a kind of warp knitting machine. The fabric wasscoured to manufacture a cloth for lace curtain.

[0086] (18) Insulation of Heat Examination

[0087] Except for having used a standard white cloth (cotton calico)instead of a brown clothing fabric, a same method as in (12) wasrepeated and insulation of heat examination was conducted. In addition,a cloth for lace curtain manufactured by a same method as in (17),except having used a yarn of 150 deniers of polyester instead of thetwisted yarn, was used as an experimental control.

[0088] As a result, a temperature in the light side of the experimentalcontrol showed 41.7° C., and a temperature in opposite side of the lightshowed 25.8° C. And a temperature in the light side of the cloth forlace curtain manufactured in (17) showed 43.8° C., and a temperature inopposite side of the light showed 26.3° C. Accordingly, it turned outthat the cloth for lace curtain manufactured in (17) gave 2.1° C. higherin the light side.

[0089] Thus, a laminated yarn 1 and a cloth including the laminated yarn1 are equipped with outstanding aesthetic appreciation property whilethey are equipped with outstanding antibacterial property, washingresistance, prevention of temperature rising, insulation of heat,antistatic property and the like.

[0090] In addition, the present invention is not limited to theabove-described embodiments and Examples, and various modification ispossible within a range of technical matter indicated in claims.

[0091] For example, as shown in FIG. 3, a coat layer 23 may be providedoutside of a synthetic resin film 21 that constitutes a laminated yarn2. As a material of coat layer 23, barium oxide, titanium oxide withphoto catalytic function, silicon compound and the like may bementioned, for example.

[0092] When barium oxide is used for a coat layer 23, X ray blockingproperty of a laminated yarn 2 may be increased. For example, a clothwoven by a laminated yarn 2 in which vapor deposition membrane 22 isconstituted by silver of thickness of 200 nm, and a coat layer with athickness of 5 to 200 microns made of barium oxide prepared on asynthetic resin film 21 may be imaged by X-rays. Textiles woven with 20to 30 of this laminated yarn 2 per 1 inch as warp and weft yarns,respectively, may block electromagnetic wave of about 60 db level.

[0093] In the case where titanium oxide is used for coat layer 23,killed microorganism by an antibacterial metal of a vapor depositionmembrane 22 may be decomposed and detoxified with a work of activeoxygen generated by a photo catalyst (titanium oxide), and in the casewhere silicon compound is used for coat layer 23, keeping warm propertyof a laminated yarn 2 may be increased.

[0094] Moreover, as shown in FIG. 4, a coat layer 33 made of pigments,such as titanium oxide, may be provided between a vapor depositionmembrane 32 and a synthetic resin film 31. Thereby, a metal color ofantibacterial metal may be disappeared, and use in textiles such aswhite robe in which yarns of metal color cannot be used becomespossible.

[0095] And as shown in FIG. 5, a coat layer 43 made of barium oxide andthe like may be provided on a vapor deposition membrane 42. Thereby,even if the amount of antibacterial metal used constituting the vapordeposition membrane 42 may be reduced, a same level of insulation ofelectromagnetic waves may be obtained, and production cost may belowered when an antibacterial metal is a silver.

[0096] Furthermore, a laminated yarn may be twisted with wooly nylon andthe like to obtain a twisted yarn, or staple fiber made of naturalfiber, such as cotton, or synthetic fibers, such as polyester, istwisted around a laminated yarn to obtain a core yarn. Thereby dyeaffinity and a usage range of the laminated yarn may be extended whilebeing able to improve a touch to skin of the laminated yarn.

[0097] In addition, the laminated yarn can also be used as a material ofbrushes for toilets and the like, or for mops for cleaning besides clothproduct by increasing thickness of a synthetic resin film. A cloth witha laminated yarn included therein may be adhered on a concrete wall,ceiling, floor, and the like, or may be applied inside, and may also beused as electromagnetic wave removal materials.

[0098] Industrial Applicability

[0099] A laminated yarn of the present invention is a yarn having asandwiched structure in which both sides of a vapor deposition membranemade of an antibacterial metal are sandwiched with synthetic resinfilms, thereby it had a beautiful appearance and high antibacterialproperty, an even after repeated washing antibacterial activity was notdeceased, and the yarn showed high prevention of temperature rising,insulation of heat, antistatic property, insulation of electromagneticwave, and flexibility.

[0100] Moreover, decomposition function by a photocatalyst, keeping warmfunction, and insulation of electromagnetic wave could also be providedby preparing a coat layer outside of a synthetic resin film.

[0101] Moreover, by preparing a coat layer made of pigments, such astitanium oxide, between a vapor deposition membrane and a syntheticresin film, metal color of antibacterial metal was decreased andcoloring in various color became possible.

[0102] Furthermore, by preparing a coat layer on a vapor depositionmembrane, an amount of antibacterial metals used, such as silver used asa vapor deposition membrane, could be reduced, and the laminated yarncould also be manufactured more cheaply.

[0103] In addition, a dye affinity was increased and a usage range of alaminated yarn was extended while being able to improve a touch to skinof a laminated yarn by twisting cotton staple fiber and the like arounda laminated yarn to obtain a core yarn.

1. A laminated yarn characterized in that an antibacterial metal isvapor-deposited onto a synthetic resin film to form a vapor depositionmembrane, the formed synthetic resin films are adhered so that a vapordeposition membrane may be placed inside, and resultant laminated filmobtained by being adhered into a sandwiched structure is cut inlengthwise direction to give a long and narrow form.
 2. The laminatedyarn according to claim 1, characterized in that a coat layer isprepared on a surface opposite to a surface on which vapor depositionmembrane of synthetic resin film is formed.
 3. The laminated yarnaccording to claim 1, characterized in that a coat layer is preparedbetween a synthetic resin film and a vapor deposition membrane or on avapor deposition membrane.